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问题 选择题

下列各组物质在溶液中能大量共存的是（　　）

A．MgCl2、Ca（NO3）2

B．KOH、FeCl3

C．Na2CO3、AgNO3

D．HCl、Ba（OH）2

答案

答案：A

补全对话，情景问答
根据对话内容，用方框内所给的句子补全对话，其中有两项是多余的。
A. I cleaned it last week.                                      B. Can you help me?
C. Sure, you can.                                                D. I need to buy some drinks and snacks.
E. OK, but I need to do my homework first.          F. OK. I'll do it at once.
G. Could you give me some money?
A: Could I invite my friends to my birthday party on Saturday, Mum?
B: 1.____________________
A: 2.____________________
B: What for?
A: 3.____________________
B: Well, I am shopping tomorrow. And I can buy drinks and snacks for you.
A: Oh, good. Thank you, Mum.
B: Tom. could you clean your room?
A: 4.____________________
B: You need to clean it again for your party.
A: 5.____________________
B: Then after you finish your homework, let's clean the room.
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单项选择题

高绩效团队的Perform特征中，O是指（）

A.关系和沟通

B.士气

C.最佳生产力

D.认可和赞美
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